Combined type-writing and computing machine.



W. WRIGHT. COMBINED TYPE WRITING AND COMPUTING MACHINE. APPLICATION HLED MAR. 6. 1912.

1 ,260,61 6. Patented Mar. 26, 1918.

2 SHEETS-SHEET I.

I w. WRIGHT. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLlCM'lON FILED MAR- 5, i912.

Pzx'sented Mar. 26, 1918.

. 2 SHEETS-SHEET 2 MT GR new UNITED STATES PATENT ()FFICE.

WALTER WRIGHT, OF NEW YORK, N. Y., ASSIGNOR T0 UNDERW'OOD COMPUTING MACHINE COMPANY, OF NEW YCRK, N.

Y., A CORPORATIDN OF NEW YORK.

S ecification of Letters Patent.

Patented Mar. 26, 1918,.

Applicationv filed March 6, 1912. Serial No. 681,965.

To all whom it may concern Be it known that I, ll aixrnn N RIGHT, a citizen of the United States, residing in New York city, in the county of New York and State of New York, have invented certain new and useful Improvements in Combined Type-lVriting and Computin Machines, of which the following is a specification.

This invention relates to carry-over mech anism, and is herein disclosed as a computing head of the master wheel type in which the master wheel operates serz'atz'm on the periphery of a series of computing wheels, or wheels driving said computing wheels. s

It has heretofore been found frequently necessary to employ strong detents for alining the computing wheels with one another, or to have a carry-over mechanism in which parts. are reciprocated into and out of engagement with the computing wheels, or to gear together various parts of the mechanism with a multitude of small, loose, separate parts which are diflicult to assemble, awkward to adjust, and liable to disarrangement. In other machines elaborate connections have been, provided for disconnecting thev computing wheels that are lower in denomination than that which is in engagement with the master-wheel. These features make such machines hard in operation and diflicu-lt to repair. The present invention is intended to provide improved means for avoiding such difliculties and such complex mechanism; and it is herein disclosed substantially as in the nature of an improve ment on co-pending application No. 642,183, filed August 3, 1911.

In said application the computing wheels as disclosed each comprise two concentric toothed members, of which one member always remains in engagement with a carryover mechanism, while the other or principal member is arranged to be engaged by a master-wheel; and the member engaged by the carry-over mechanism is always either positively driven or positively locked through said mechanism by the computing wheel next lower in denomination. This is accomplished by means of a Geneva lock, without reliance upon springs. A coupling device causes these two members of each computing wheel to revolve as a unit, and this coupling device is placed inside the applied to computing wheel. The carry-over mechanism is therein shown outside the computing wheels, and the coupling devices are so re lated to the plane of the maisteravheel, that each computing wheel higher in denomination than the one momentarily engaged by the master wheel is controlled by one of said coupling devices, While the computing wheels lower in denomination have no such coupling device and consequently their principal members cannot be afiected by the capry-over mechanism.

in the present invention the master-wheel is preferably located outside the computing wheels, and dial wheels are preferably provided separately from the computing wheels; and preferably both the dial wheels and the computing wheels are geared together by means of an intermediate gear on which the master wheel. operates. By having the main part of the computing mechanism separate from the dial wheels, a broad surface is obtained on those wheels, on which distinct numerals may be placed. Preferably positive means are provided for locking all computing wheels not engaged by the couplers or master-wheel, and also preferably positive alining means for the couplers are arranged to keep them in such position that their teeth will mesh with the teeth of the computing wheels, as they slide into each other. The present invention provides a construction economical to build, easy to repair, and easy to drive.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure. 1 represents a section, through a totalizer.

Fig. 2 is a front view of the same, partly broken away.

Fig. 3 is a perspective view of a dial wheel and certain associated parts.

Fig. 4: is a section of the broken line ABCD of Fig. 1.

Fig. 5 is a diagrammatic plan view of Fig. 4.

Fig. 6 shows a computing wheel and its associated carry-over wheel viewed oppositely to Fig. 1.

Fig. 7 is a perspective view of a coupler.

The invention is herein disclosed as applied to a typewrting machine and in the drawings, 1 is the front of a typewritingmachine in grooves 2 in which ride arms 3' of a totalizer carriage 3 carrying a totalizer l. In said totalizer are mounted dial wheels 5 driven by a master-wheel 6 through an intermediate wheel 7, there being a separate intermediate wheel 7 for each dial wheel and one master-wheel for the totalizer. Each of said intermediate wheels 7 also drives a computing wheel 8 which 1s formed with internal teeth 9 and external teeth 10.

Against the face of said computing wheel toward the next lower computing wheel 1n denomnation (which face is the part carrying said teeth 10) is a loose wheel 11 having external teeth 12 and internal. teeth 13; both sets of said teeth preferably corresponding to the teeth on the computing wheel proper.

The peripheral teeth 10 on the computing wheel mesh with the teeth l l on the intermediate wheel so that said computing wheel is driven by the master-wheel when said master-wheel is in mesh with said intermediate wheel.

A carry-over wheel 18 is arranged outside of each computing wheel and has teeth 19 meshing with the teeth 12 on said loose wheel. On the periphery of the adjoining computing wheel next lower in denomination is cut a ledge 20 in the groove formed by which, ride narrow teeth 21 on said carry-over wheel. Said teeth 21 are adapted to be struck by teeth 22 on said adjoining computing; wheel once in each revolution of said computing wheel, and a broad tooth 23 On said carry-over wheel is arranged to sink into a road space 24 on said adjoining computing wheel when it is turned by teeth 21 striking teeth Said broad teeth 23 normally ride on the periphery of said adjoining computing wheel forming 3 Geneva lock with it for the carry-over wheel, as seen in Fig. 3.

Thus it will be seen that the Geneva lock formed by the carry-over wheel and the computing wheel will be broken on('e in each revolution, due to one of the teeth 21 on Said carry-over wheel being struck by a tooth 22 on the computing wheel, and the carry-over wheel will turn until the next broad tooth 23 locks with the periphery of said computing wheel.

All computing wheels higher in denomination than the computing wheel engaging the master-wheel have internal couplers 15 riding in them. Said couplers ride loose on a shaft 16, and teeth 17 on said couplers project between the internal teeth of the computing wheel and couple each computing wheel with the loose wheel next below it in denomination so that said loose wheel and computing wheel will revolve as a unit when said coupler lies within them. forming what might be termed a composite computing wheel.

Thus the extreme left-hand computing wheel in Figs. l and 5, and all wheels to the left of said wheel would therefore be engaged by couplers 15. The position of the master-wheel 6 is shown in dotted lines in Fig. 5, and sleeve 16 on shaft 16, holds the couplers so that the end one is always one computing wheel above the masterwheel. There are a suliicient number of couplers, so that when the master-wheel is engaged with the units wheel of the totalizer, there will be one coupling for every computing wheel higher in denomination, and as the totalizer master-wheel, it will successively engage the different couplers. No couplers are engaged with the computing wheels lower in denomination than the master-wheel. It will accordingly be seen that the carry-over wheels for said computing wheels lower in denomination are connected only with the loose wheels, and so cannot operate on the principal members of the computing wheels.

The couplers to the left of the totalizer are kept alined by a bar 25 fast on the totalizer, and traveling with it, so that the teeth on the couplers will mesh with teeth on the computing wheels as they slLde on to each other.

The computing wheels to the right of the master-wheel are kept from turning by a blade or bar 26, which is fixed relatively to the plane of the master wheel, and extends between the internal teeth of the computing wheels. In this way, every dial wheel is kept locked at all. times through its computing wheel, unless the computing wheel is engaged and locked by its carry-over gearing or master wheel. The computing mechanism is therefore positively locked or positively driven.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

travels across th 1. In a computing machine, the combination with a. plurality of computing wheels, of a driving gear co-axial with each wheel, a normally idle gear also co axial with said computing wheel, carrying mechanism, means including gear teeth for coupling a computing wheel of lower order and an idle gear of higher order during a carrying operation, and means cooperative with said driving gear for actuating the same.

2. In a combined typewriting and comput ing machine, the combination with a travel- ,ig carriage, of atotalizer and a master wheel relatively movable under control of said carriage, said totalizer comprising a plurality oi? dial wheels having numerals on the face thereof. a shaft for said dial wheels. a plurality of computing wh els, one for each dial wheel, a shaft whereon said computing wheels are mounted, carrying mechanism, a driving gear co-axial with each computing wheel, a normally idle gear also co-axial with each computing wheel, and.

means for coupling a computing wheel of lower order and an idle gear of next higher order during a carrying operation, said master wheel cooperative with a driving gear and a dial wheel ,ofthe same denomination. 7

3. In a combined typewriting and computing machine, the combination with a traveling carriage, of a totalizer. and a master wheel relatively movable under control of said carriage, said totalizer comprlsing a plurality of dial wheels having numerals on the face thereof, a shaft therefor, a plurality of computing wheels, one for each dial wheel, a shaft whereon said computing wheels are mounted, carrying teeth and a driving gear on each computing wheel, said driving gear being co-axial with its corresponding computing wheel, a normally idle gear also co-axial with said computing wheel, carry-over mechanism operated from said carrying teeth, and means for coupling a computing wheel of lower denomination and an idle gear of higher denomination during the carrying operation, said master wheel cooperative with a driving gear and a dial wheel of the same denomination.

4:. A totalizer having denominational units, each unit comprising a computing wheel having a Geneva locking surface, carrying teeth and an external gear, said unit further comprising a loose wheel coaxial with said computing wheel, devices for coupling together said computing wheel and said loose wheel, carry-over devices operated from the carrying teeth on a computing wheel of a lower order and acting through said loose wheel and coupling devices to move a computing wheel of next higher order, said loose wheel being locked by said Geneva locking surface except during the carrying operation, and means cooperative with said external teeth on said computing wheel for driving the same.

5. A totalizer and a master wheel movable relatively thereto, said totalizer comprising a plurality of dial Wheels and a shaft therefor, a plurality of computing wheels, one wheel for each dial wheel, a shaft whereon said computing wheels are mounted, carrying mechanism, a driving gear co-axial with each computing wheel, a normally idle gear also co-axial with each computing Wheel and external thereof, means forcoupling a computing wheel of lower order and an idle gear of next higher order during a carrying operation, and a series of intermediate wheels, one for each computing wheel, cooperating with the driving gear thereof and also with a dial wheel of corresponding denomination; said master wheel cooperating with said intermediate wheels during relative movement of said master wheel and said totalizer.

6. In a computing machine, the combination, with a plurality of computing wheels, each having a gear, and a master wheel for driving said computing wheels seriaz' z'm through said gears; of a loose gear for each computing wheel disposed co-axially therewith, each computing wheel and its associated loose gear having corresponding sets of gear teeth; carry-over mechanism e11- gageable with said loose gears to turn the same; and coupling means engaging the teeth on a con'iputiug wheel and its said associated loose gear, to cause them to rotate in unison during the carry-over.

7. In a computing machine, the co1nbination, with a plurality of computing wheels, each having an external peripheral gear, and a master wheel for driving said com puting wheels scriatz'm through said gears; of an externally-toothed loose gear for each computing wheel, each computing wheel and its associated loose gear having corresponding sets of gear teeth; carry-over mechanism engageacle with the external teeth on said loose gears to turn the same; and coupling means engaging the teeth on a computing wheel and its said associated loose gear, to cause them to rotate in unison during the carry-over.

8. In a computing machine, the combination, with a plurality of computing wheels, each having an external peripheral gear, and a master wheel for driving said computing wheels scrz'am'm through said gears, of an externally-toothed loose gear for each computing wheel, each computing wheel and its associated loose gear having corresponding sets of internal gear teeth; carryover mechanism engageable with the external teeth on said loose gears to turn the same; and coupling means disposed internally of said computing wheels and their associated loose gears for engagement with the internal teeth thereof, to cause a computing wheel and its loose gear to rotate in unison during the carry-over.

9. The combination, with a pair of juxtaposed, externally-toothed computing wheels, and an interposed loose gear disposed co-axially therewith; of a pair of externally-toothed dial wheels, one for each computing wheel; a pair of intermediate gears, each meshing with the teeth. on a computing wheel and on a dial wheel; a master wheel arranged to engage and. drive said intermediate gears seriatim; a carryover device controlled by one computing wheel, and arranged to engage and drive said loose gear; and means for coupling said loose gear and the other computing wheel to rotate in unison during the carryover.

10. A totalizer having denominational units, each unit above the lowest order comprising a computing wheel, a wheel coaxial therewith and fixed thereto, and a loose wheel also co-axial with said computing wheel; coupling devices including gear teeth between the denominational units, carry-over devices between said units operative from a computing wheel of lower order, and acting through said loose wheel and said coupling devices to turn a computing wheel of next higher order, and means acting to drive a computing wheel through the medium of said fixed wheel.

11. A totalizer having denominational units, each unit above the lowest order comprising a computing wheel having a Geneva locking surface, carrying teeth, internal teeth, and an external gear, said unit further comprising a normally loose wheel coaxial with said computing wheel, said loose wheel having internal teeth of the same formation as the internal teeth on said computing wheel, devices for coupling together said computing wheel and said loose wheel, carry-over devices operated from the carrying teeth on the computing wheel of lower order, and acting through said loose wheel and coupling devices to move a computing wheel of next higher order, said loose wheel being locked by said Geneva locking surface, except during the carrying operation, and means cooperative with the external gear of said computing wheel for driving the same.

12.111 a totalizer, the combination of lower and higher order computing wheels, each having tens-carrying teeth, tens-carrying mechanism for transmitting movement from a lower computing wheel to the next higher computing wheel, and including a member engageable by the teeth on the lower computing wheel, a transmitting wheel moving with said member, a loose wheel engaged by said transmitting wheel, means for coupling said loose wheel and the next higher computing wheel, and a driving gear for Said computing wheel of higher order situated between the plane of the carrying teeth of said higher order wheel and said loose wheel.

WALTER WRIGHT.

Witnesses B. GOLDBERG, C. RIPLEY- Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patent. Washington, D. C. 

